Hydraulic Single-Acting Spring Return Actuators (HSA)

Surface Actuation

Simplified Fail-Safe Operation

The Master Flo HSA Actuator blends the robustness of hydraulic piston technology with a spring-return mechanism, mirroring the fail-safe functionality found in pneumatic systems. This innovative design ensures reliability through simplified fail-safe operations, even in the absence of hydraulic supply pressure. Ideal for applications demanding uncompromised safety and efficiency, the HSA Actuator represents a significant advancement in hydraulic control systems, providing a streamlined solution to traditional hydraulic actuation challenges.

Hydraulic Piston Technology: Incorporates Master Flo’s proven hydraulic piston actuator for robust performance.
Spring-Return Mechanism: Adds the flexibility and reliability of spring-return action for fail-safe operation.
Simplified Fail-Safe: Ensures operation continuity even with the loss of hydraulic supply, offering a simplified approach to fail-safe mechanisms compared to traditional systems.
Enhanced Safety: Designed to provide an additional layer of operational safety across various applications.
Flexibility in Use: Suitable for a wide range of applications requiring precise control and reliability.

Fail Action

Spring Fail Close
Spring Fail Open
Fail Last

Control Signal (with control system)

4–20 mA
HART
Fieldbus

Feedback Signal (positioner dependent)

4–20 mA
HART
Fieldbus

Maximum Supply Pressure

1500 psig

Hazardous Area Certification

CSA/FM/UL: Explosion Proof or Intrinsically Safe,
ATEX/IEC: Intrinsically Safe or Flameproof

Options

Solenoid Valves
Position Controller
Handpump Override

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Fail Action

Control Signal

Feedback Signal

Hazardous Area Certification

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Head Office

4611 74 Avenue
Edmonton, Alberta
Canada, T6B 2H5

Tel: 1.780.468.4433
Fax: 1.780.469.9853

Contact Sales

Canada
1.403.269.5531 (MST)

US
1.713.690.2789 (CST)

Europe
44(0)1224.878.999 ( GMT+0)

Middle East
00971(0)4.552.0907 (GMT+4)

Asia Pacific
Indonesia: (62-21)5964.1925 (GMT+7)
Malaysia: +60.3.2181.6565

Houston Training Center

9715 Derrington Road
Houston, Texas
United States
77064–5807

Tel: 1.713.690.2789
Fax: 1.281.517.0007